Nothing drastic, as you can see. Pretty much similar to what they did with the IS sedan for 2009. Revised lights, front and rear. New bumpers etc... Just details.
But the bigger news is under the hood. They will offer a V6 for the 1st time. it is supposed to be a stronger version of the 3.5 Liter they put in pretty much everything they make, from the Camry to the Lexus GS. In the LS it would produce over 310 hp. Which should be more than enough for most people, really.